@GeronimoMartinez: This does not affect CMC, thats a characteristic of the card. It only affects how much how much you have to pay for that card. So even if I have this out, my opponent still couldn't Smother my creature with CMC 4, even if I only paid .And as far as the Everflowing Chalice debate goes, use both. Kicker is part of the casting costs (as an additional but optional cost), which means if you choose to pay the Multikicker, that becomes part of its cost to cast the spell (making its casting cost ). Semblance Anvil clearly states it costs less to cast, so you get the first kicker free.

@ CeremonialBathory, some clarification: It does reduce ALL Artifact AND all Creature spells by 2, but it does not reduce all Artifact Creatures by 4. As is clearly stated in the rules, it can only affect one type.

The reason to use this over Everflowing Chalice, and the reason that this is better than an Everflowing Chalice for 4 is: this REDUCES THE COST of ALL spells you cast of the imprinted type(s). You can cast 2 mana or less artifacts for free, if you cast only one spell of the type, you may as well have just used the chalice, if you cast two, your mana savings is 100% more than using the chalice, if you cast three its 200% more. If all I wanted was two extra mana, I'd play Palladium Myr, but if I want to play a large number of spells in one turn, the Anvil is vastly superior.

@Bandswithother - An artifact creature shares a type with both creatures and artifacts. If you exile an artifact creature like a Myr with this card, it will reduce all Artifact costs by andall Creature costs by . So, you're assumption is correct.